This is an installation question:  I'm hoping to set up my disk with
   multiple OS's on it and use OS/2's boot manager to switch between them.
   I want my disk to look like this:

   Primary Partition 1		DOS
   Primary Partition 2		OS/2 Boot Manager
   Extended Partition	
	   Logical Drive 1		OS/2
	   Logical Drive 2		NetBSD
	   Logical Drive 3		A different version of NetBSD

   The OS/2 install manual implies that this sort of thing is feasible.
   But is it really?  Can NetBSD be installed on a logical drive?

Yes, but only if you have a partition in the primary partition table
that contains the NetBSD label, and is of the right type (165,
decimal).  Also, you need to be careful to get the partition offsets
and sizes correct in the NetBSD label, accounting for the track at the
beginning of the disk and each extended partition that's reserved for
the boot record.